地理学报 ›› 1999, Vol. 54 ›› Issue (s1): 93-100.doi: 10.11821/xb1999S1012

• 论文 • 上一篇    下一篇

澜沧江流域河流泥沙发展趋势初步研究

尤联元   

  1. 中国科学院地理研究所,北京100101
  • 收稿日期:1998-12-30 修回日期:1999-04-05 出版日期:1999-12-15 发布日期:1999-12-15
  • 基金资助:
    国家自然科学基金“九五”重点项目(49631020)

A STUDY ON TEMPORAL CHANGES OF RIVER SEDIMENTATION IN LANCANG RIVER BASIN

You Lianyuan   

  1. Institute of Geography,CAS,Beijing 100101
  • Received:1998-12-30 Revised:1999-04-05 Online:1999-12-15 Published:1999-12-15
  • Supported by:
    Supported by the key Project of the National Natural Science Foundation of China,No.49631020

摘要: 本文将澜沧江划分成上、中、下三段。根据实测水文泥沙资料,分析了50年代以来该三段各自的水沙变化过程,以及它们之间的差别,发现水量变化比较平稳,泥沙则有增加趋势。文章从自然和人类活动两方面对变化原因作了探讨。

关键词: 澜沧江, 河流泥沙, 发展趋势

Abstract: Lancang River is one of the most important international rivers in the world.Development and utilizationof its water resources are getting more and more important in recent years. This paper deals with changes ofriver sediments thnough time and the reasons.The main research methods used are as follows: 1) Dividing the Lancang River above in China into threereaches; the upper reach above Jiuzhou, the middle reach between Jiuzhou and Gajiu, and the lower reachbelow Cajiu, then studying and analyzing the change processes of runoff and sediments thnough time and ’cor-relation ship of the sediments to the runoff in each reach respectively. 2) Taking population and total produc-tion value of industry and agriculture as index to show intensity of human activities; at first, to establish cor-relation of population to the total production value, then together with the runoff; to analyze correlation of thetwo to river sediment situation, again in three different river reaches respectively.The results are as follows:(1) Since 1950s, the changes of the runoff with time has maintained basically stable, but the silt con-centration and the sidement discharge modulus increased slowly; Silt concentration at the samedischarge condition increases with time. That is to say, the source of sediment from the basin in-creases also.(2) Comparing the value of sediment discharge modulus of these different river reaches, it is discov-ered that the value of the middle reach is the largest, then the lower reach and the upper reach isthe smallest.(3) There is very good relationship between the population and the total production of industry and a-gricultuie. The correlation coefficients of three different river reaches are 0.893, 0.97 and 0.97respectively. So it is reasonable that the population may take the place of the total value of indus-try and agriculture in studying correlation between river sediment and population growth.(4) Multi - correlation analysis of sediment discharge modulus (Qsm) to population (P) and comingwater volume (Q) shows that the correlations among them are good.So the conclusion is that the coining water volume and intensity of human activities have influences onthe coming sediments from the basin. The later and acceleration erosion, resulted from human activities, aretwo important reason causing the coining sediment and the sediment discharge modulus increase.

Key words: Lancang River, river sedimentation, developing tendency

中图分类号: 

  • TV148